研究简报 Short communications

酵母多糖对哺乳犊牛胃肠道发育及消化酶活性的影响

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  • 1. 河北农业大学动物科技学院, 保定 071001;
    2. 河北农业大学动物医学院, 保定 071001;
    3. 河北省衡水市农牧局, 衡水 053000;
    4. 河北省隆化县农牧局, 隆化 068150
董金金(1991-),女,河北邯郸人,硕士研究生,研究方向为反刍动物营养与饲料科学。E-mail:1101200570@qq.com

收稿日期: 2018-04-19

  网络出版日期: 2018-12-19

基金资助

国家现代农业(奶牛)产业技术体系建设专项资金(CARS-36);河北省科技计划项目(16226604D);河北省奶牛创新团队(HBCT2018120203)

Effects of Yeast Polysaccharide on Gastrointestinal Development and Digestive Enzyme Activity of Sucking Calves

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  • 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China;
    2. College of Veterinary Medicine, Hebei Agricultural University, Baoding 071001, China;
    3. Hengshui Bureau of Agriculture and Animal Husbandry, Hengshui 053000, China;
    4. Longhua County Bureau of Agriculture and Animal Husbandry, Longhua 068150, China

Received date: 2018-04-19

  Online published: 2018-12-19

摘要

本试验旨在研究饲粮中添加不同剂量的酵母多糖对哺乳犊牛胃肠道发育及消化酶活性的影响。选择初生重相近的健康中国荷斯坦犊牛56头,随机分为4组,每组14头。Ⅰ组(对照组)饲喂基础饲粮,Ⅱ、Ⅲ、Ⅳ组在饲喂基础饲粮中分别添加1、2、3 g/(头·d)酵母多糖。试验期60 d。结果表明:1)Ⅱ、Ⅲ、Ⅳ组犊牛瘤胃淀粉酶、胃蛋白酶、脂肪酶和羧甲基纤维素酶活性高于Ⅰ组,其中Ⅲ组显著高于Ⅰ组(P<0.05);Ⅲ组犊牛十二指肠淀粉酶、胰蛋白酶、脂肪酶、羧甲基纤维素酶活性显著高于Ⅰ组(P<0.05);Ⅲ组犊牛空肠淀粉酶(P<0.05)、胰蛋白酶(P<0.01)活性显著或极显著高于Ⅰ组,Ⅱ、Ⅲ、Ⅳ组空肠脂肪酶、羧甲基纤维素酶活性显著高于Ⅰ组(P<0.05)。2)Ⅲ组犊牛瘤胃乳头长度、宽度和黏膜厚度显著高于Ⅰ组(P<0.05);十二指肠、空肠中段绒毛高度显著高于Ⅰ组(P<0.05),隐窝深度显著低于Ⅰ组(P<0.05),绒毛高度/隐窝深度(V/C)显著高于其他各组(P<0.05)。由此可见,添加酵母多糖能促进犊牛胃肠道形态发育,提高胃肠道消化酶活性。在本试验条件下,哺乳犊牛饲粮中酵母多糖的适宜添加量为2 g/(头·d)。

本文引用格式

董金金, 高艳霞, 李妍, 李秋凤, 曹玉凤, 刘博, 许利民, 李建国 . 酵母多糖对哺乳犊牛胃肠道发育及消化酶活性的影响[J]. 动物营养学报, 2018 , 30(12) : 5247 -5254 . DOI: 10.3969/j.issn.1006-267x.2018.12.054

Abstract

This experiment was conducted to investigate the effects of different doses of yeast polysaccharide in diets on the gastrointestinal development and digestive enzyme activity of sucking calves. A total of 56 healthy Chinese Holstein calves with a similar born weight were selected and randomly divided into 4 groups, with 14 heads in each group. Calves in group Ⅰ (control group) were fed the basal diet, and those in groups Ⅱ, Ⅲ and Ⅳ were fed the basal diet supplemented with yeast polysaccharide at the dosage of 1, 2, 3 g per day per head, respectively. The experiment lasted for 60 days. The results showed as follows: 1) the activities of amylase, pepsin, lipase and carboxymethylcellulase in the rumen in groups Ⅱ, Ⅲ and Ⅳ were higher than those in group Ⅰ, and the group Ⅲ was significantly higher than group Ⅰ (P<0.05). The activities of amylase, trypsin, lipase and carboxymethylcellulase in the duodenum in group Ⅲ were significantly higher than those in group Ⅰ (P<0.05). The activities of amylase (P<0.05) and trypsin (P<0.01) in the jejunum in group Ⅲ were significantly higher than those in group Ⅰ, and the activities of lipase and carboxymethyl cellulose in groups Ⅱ, Ⅲ and Ⅳ were significantly higher than those in group Ⅰ (P<0.05). 2) The rumen papillae length, width and mucosal thickness of calves in group Ⅲ were significantly higher than those in group I (P<0.05); the villus height of duodenum and jejunum in group Ⅲ was significantly higher than that in group Ⅰ (P<0.05), crypt depth was significantly lower than that in group Ⅰ (P<0.05), the villus height/crypt depth in group Ⅲ was significantly higher than that in other groups (P<0.05). In conclusion, adding yeast polysaccharides can promote the morphological development of gastrointestinal tract and improve the digestive enzyme activity of sucking calves. Under the conditions of this experiment, the suitable dosage of yeast polysaccharide in the diet of sucking calves is 2 g per day per head.

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